Great Plains 3N-4020 Operator Manual - Manual (Page 65)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 61
2013-10-29 Table of Contents Index 196-359M
Frame Height without
Frame-Mounted Coulters
Use these instructions with a drill having no coulters, or
having unit-mounted coulters (UMC). Adjustments to
individual unit-mounted coulters themselves (10HD mod-
els only) are on page 76.
If the drill has frame-mounted coulters, use the height
procedure on page 63.
Refer to Figure 87
Frame height is measured from the bottom of the
opener tool bar (the largest of the tool bars), and is mea-
sured with the drill lowered.
The recommended height depends on your field condi-
tions (see table below), and whether unit-mounted
coulters are installed.
For no-till conditions, a 26in (66cm) height allows the
opener parallel arms to run parallel to the ground giving
the opener the maximum upward or downward flotation.
In loose or conventional planting conditions, a frame
height above 26in (66cm) helps keep the no-till spring
forces from burying the openers.
Note: Setting the frame above the 26in (66cm) limits the
opener downward flotation.
Note: Running with the frame below 26in (66cm) limits
opener upward flotation and could cause opener
damage especially at center of the drill.
Conditions Unit
Opener
Tool Bar Height
Light no-till, or conven-
tional tillage, with unit-
mounted coulters or no
coulters
3N-4010HDF
3N-4010F
3N-4020F
Above 26in (66cm)
Above 24in (61cm)
Above 24in (61cm)
Moderate to challenging
no-till with unit-mounted
coulters 3N-4010HDF
3N-4010F
3N-4020F
At 26in (66cm)
At 24in (61cm)
At 24in (61cm)
27213
Figure 87
UMC/NC Frame Height
27214
1
1
1